pulmonary hypertension- the other hypertensionanmedhealth.org/portals/0/pdfs/ph talk-ems.pdf ·...
TRANSCRIPT
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Pulmonary Hypertension- The
Other Hypertension
Antine E. Stenbit MD,PhD
Pulmonary and Critical Care
Greenville Heath System
20 October 2016
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Pulmonary
Hypertension
Pulmonary Arterial
Hypertension
Pulmonary Venous
Hypertension
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PV Ao VC PA RA RV
Pulmonary
Capillary
Bed LA LV
COPD, IPF, OSA
CTEPH, PAH
Pulm Stenosis PVOD DCM
HCM
LVDD
HTN
Elevated PCWP, normal PVR Normal PCWP,
Elevated PVR
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Pulmonary arterial hypertension (PAH) is a
progressive, incurable disease of the small
pulmonary arteries characterized by vascular cell
proliferation, aberrant remodeling, and thrombosis
in situ
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Hoeper MM, et al. J Am Coll Cardiol. 2013;62:D42-50.
Pulmonary Arterial Hypertension (PAH)
Mean pulmonary artery pressure (mPAP) ≥25 mm Hg
And
Mean pulmonary artery wedge pressure (PAWP) ≤15 mm Hg
With
Pulmonary vascular resistance (PVR) >3 Wood units
As measured by right-heart catheterization.
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Pulmonary Vascular Histopathology
Normal Pulmonary Artery Idiopathic PAH
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Pathogenesis of PAH
Gaine S. J Am Med Assoc 2000;284:3160-68
Aventitia
Media
Intima
Smooth
Muscle
Hypertrophy
Early Intimal
Proliferation
Collagen Vascular Disease
Congenital Heart Disease
Portal Hypertension
HIV Infection
Drugs and Toxins
Pregnancy
Abnormal BMPR2 Gene
Other Genetic Factors
Endothelial Dysfunction
↓Nitric Oxide Synthase
↓Prostacyclin Production
↑Thromboxane Production
↑Endothelin 1 Production
Smooth Muscle Dysfunction
Impaired Voltage-Gated
Potassium Channel (Kv1.5)
Smooth Muscle
Hypertrophy
Adventitial and Intimal
Proliferation
In situ
Thrombosis
Plexiform
Lesion
Loss of Response to
Short-Acting Vasodilator
Trial
Vasoconstriction
Advanced Vascular
Lesion
IRREVERSIBLE DISEASE
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Pulmonary Hypertension WHO Group 1 ● Group 1 Pulmonary Arterial Hypertension (PAH)
- Idiopathic (IPAH)
- Heritable (HPAH)
- BMPR2
- ALK-1, endoglin, SMAD9, CAV1, KCNK3
- Unknown
- Drugs and toxins induced
- Associated with
Connective Tissue Diseases- Scleroderma, SLE
HIV Infection
Portal Hypertension
Congenital Heart Diseases
Schistosomiasis
Group 1’ Pulmonary Veno Occlusive Disease (PVOD) and/or Pulmonary Capillary
Hemangiomatotis (PCH)
Group 1” Persistent pulmonary hypertension of the newborn (PPHN)
Simonneau G, et al. J Am Coll Cardiol. 2013;62:D34-41.
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Pulmonary Hypertension WHO Group 2-4
Group 2 -- Pulmonary Hypertension Due to Left Heart Disease
Left Ventricular Systolic Dysfunction
Left Ventricular Diastolic Dysfunction
Valvular disease
Congenital / acquired left heart inflow / outflow tract obstruction
Group 3 -- Pulmonary Hypertension Due to Lung Diseases and/or Hypoxia
Chronic obstructive pulmonary disease
Interstitial lung disease
Other pulmonary diseases with mixed restrictive and obstructive pattern
Sleep-disordered breathing
Alveolar hypoventilation disorders
Chronic exposure to high altitude
Group 4 – Chronic Thromboembolic Pulmonary Hypertension (CTEPH)
Simonneau G, et al. J Am Coll Cardiol. 2013;62:D34-41.
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Pulmonary Hypertension WHO Group 5
Group 5 – Pulmonary Hypertension with Unclear Multifactorial Mechanisms
Hematologic disorders: chronic hemolytic anemias, myeloproliferative disorders,
splenectomy
Systemic disorders: Sarcoidosis, pulmonary Langerhans cell histiocytosis,
Lymphangioleiomyomatosis, neurofibromatosis, vasculitis
Metabolic disorders: Glycogen storage disease, Gaucher disease, thyroid disorders
Others: Segmental PAH, tumoral obstruction, fibrosing mediastinitis, chronic renal
failure
Simonneau G, et al. J Am Coll Cardiol. 2013;62:D34-41.
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Functional Class
Symptomatic profile
I Patients with pulmonary hypertension but without limitation of physical activity. Ordinary physical activity does not cause dyspnea or fatigue, chest pain, or near syncope
II Patients with pulmonary hypertension resulting in slight limitation of physical activity. They are comfortable at rest. Ordinary physical activity causes undue dyspnea or fatigue, chest pain, or near syncope
III Patients with pulmonary hypertension resulting in marked limitation of physical activity. They are comfortable at rest. Less than ordinary activity causes undue dyspnea or fatigue, chest pain, or near syncope.
IV Patients with pulmonary hypertension with inability to carry out any physical activity without symptoms. These patients manifest signs of right heart failure. Dyspnea and/or fatigue may even be present at rest. Discomfort is increased by any physical activity
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Examination Findings Suggestive of
PH/PAH
Neck: HJR, JVD
Lungs: CTA w/o
wheeze /
crackles
Heart: Heave,
RRR,
Increased P2,
TR SM
Skin: Changes
c/w CTD
Joint:
Changes
c/w CTD
Liver:
Hepatomegaly
Pulsatile liver
Extremities:
Edema Digits: Cool,
Cyanotic
Abdomen:
Ascites
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EKG signs of RH Strain
Non sinus rhythms
Incomplete or complete RBBB
S1Q3T3
Twave inversions in V1,V2, V1-V3, or V1-V4
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McLaughlin VV et al. J Am Coll Cardiol 2009;53:1573-1619
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Echocardiogram in PH/PAH
Echocardiogram findings in PH RA/RV
RAE, RV dilation
RV dysfunction
Elevated PAP
Echocardiogram findings in PH associated with left heart disease
LAE, LVH, LV dilation
LV systolic dysfunction
Grade II/III diastolic dysfunction
Mitral/aortic valvular disease
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Important data: RAP, RV, PAP, PCWP, TPG, CO/CI, PVR, and
Saturations of Vena cava, RA, RV and PA
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PVH PAH
PCWP
LAP
LVEDP
PVR
TPG
PH
PBF CO
RHC distinguishes:
Left Heart Disease
PAH
CTEPH
High output
Fever, anemia..
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Why should YOU care?
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Because you may see some people
with PAH
Cautions with medications
What not to give
What not to stop
Who to be afraid of
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PH Clinic Increasing in Size at GHS
Approximately 150 patients
75-80 patients on PH drugs
20-25 on prostacyclins
Regional Center
Several recent visits to the ED/OR
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Pharmacologic Treatment
Diuretics (Lasix, Demadex, Bumex)
Spironolactone
Anticoagulation
PAH focused therapy
Treatment of RHF
Management of other Comorbid conditions
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PAH specific FDA-approved Therapies (in
U.S.)
Route
Oral
Inhaled
Subcutaneous
Intravenous
Mechanism of Action
Phosphodiesterase Inhibitors
Endothelin Receptor Antagonists
Stimulator of soluble guanylate cyclase (sGC)
Prostacyclins/Prostanoids
Prostacyclin Receptor Agonist
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Eight Oral Therapies
Endothelin Receptor Antagonists
Ambrisentan- improvements in 6MW, time to clinical worsening, functional class
Bosentan- improvements in 6MW, time to clinical worsening, functional class, hemodynamics
Macitentan- improvements in 6MW, time to clinical worsening
Phosphodiesterase Inhibitors
Sildenafil- improvements in 6MW, functional class, hemodynamics
Tadalafil- improvements in 6MW, functional class, time to clinical worsening
OTHERs
Riociguat- improvement in 6MW,
functional class
Oral treprostinil
Selexipag (Uptravi)
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ERAs
Bosentan = Tracleer
Ambrisentan = Letairis
Macitentan = Opsumit
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Endothelin Receptor Antagonists:
Side Effects
Can worsen diastolic dysfunction/edema
Liver function abnormalities
Anemia
Teratogenicity
headache, nasal congestion, flushing, and nausea
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Bosentan/Macitantan
Decreases cyclosporine, glibenclamide, simvastatin, and
warfarin by up to 50 % via induction of CYP3A4
and/or CYP2C9
Renders hormone-based contraception ineffective
Ketoconazole doubles the exposure to bosentan via
inhibition of CYP3A4
Co-administration of bosentan and sildenafil, a decrease
in sildenafil
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Ambrisentan
Only significant interaction with cyclosporine A,
with a twofold increase in ambrisentan
concentration
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PDE5 Inhibitors- Side Effects
Hypotension
Sudden Hearing Loss
Anterior optic neuropathy
Dizziness, flushing, dyspepsia, nasal congestion
or rhinitis
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PDE5 Inhibitors for PH
Sildenafil = Revatio
Tadalafil = Adcrica
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PDE5 Drug Interaction
Nitrates
Alpha blockers
Riociguat
HIV protease inhibitors, ketoconazole,
itraconazole, any cytochrome P450 enzyme
CYP3A4 inhibitor or activator
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Riociguat (Adempas): Side Effects
Hypotension
Bleeding
Epistaxis
Teratogenicity
Anemia
Headache, vomiting, GERD, dizziness, gastritis
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Riociguat-Interactions
PDE5 Inhibitors
Nitrates
Antacids
Strong inducers of CYP3A
Smoking- reduction of serum levels
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Selexipag
Strong CYP2C8 inhibitors- increase selexipag
Headache, Diarrhea, Jaw pain, Nausea, Myalgia,
Vomiting, Pain in Extremity, Flushing,
Arthralgia, Anemia, Decreased appetite
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IV, SQ and Inhaled Therapies
Parenteral therapies
Epoprostenol-improvements in survival, 6MW, hemodynamics
Treprostinil (subcutaneous also)- improvement in 6MW, hemodynamics
Inhaled therapies
Iloprost- improvement in 6MW, hemodynamics
Treprostinil- improvement in 6 MW, hemodynamics
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Prostacyclins
IV Epoprostenol = Flolan and Veletri
IV and SQ Treprostinil = Remodulin
Inhaled Iloprost = Ventavis
Inhaled Treprostinil = Tyvaso
Oral Treprostinil = Orenitram
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Pumps
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Side Effects Prostacyclins
Headache, flushing, hypotension,
thrombocytopenia, anemia, teratogenic
Flushing, jaw pain, rash, line
infection/malfunction
Nausea, vomiting, diarrhea, tachycardia,
paresthesia,
Bleeding: INHIBITOR of platelet aggregation
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IV therapy
Continuous infusion
Flolan/Veletri t ½ 3-5 minutes
ALWAYS dedicated IV access
NEVER flush line
Line needs to be PRIMED
PLEASE DO NOT STOP OR CHANGE
DOSE without talking to us
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SQ therapy
Continuous infusion
Remodulin t ½ 4 hours
Site pain, erythema, induration
Continue as long as you can
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Inhaled Prostacyclins
4-9 times a day
Have their own nebulizers
Can cause cough, bronchospasm
Short half life
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Non-Pharmacologic Treatments
Oxygen
CPAP/BiPAP
Salt/water intake/dietary counseling
Side Effects of Medications
Symptoms of concern Lightheadedness, dizziness, syncope Fullness, early satiety Swelling, ascites
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Non-Pharmacologic Treatments
Disability
Exercise- avoid heavy lifting and vagal
maneuvers
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Pharmacologic Treatment
Diuretics
Spironolactone
PAH focused therapy
Treatment of RHF
Management of other Comorbid conditions
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Avoidance of pulmonary hypertensive
crisis
Avoid hypoxic pulmonary vasoconstriction
Avoid hypercarbia, acidosis and hypothermia
Avoid high airway pressures
Optimize right ventricular preload
Reduce right ventricular afterload
Maintain coronary blood flow
Maintain sinus rhythm
Maintain arterial blood pressure and cardiac output
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Pulmonary Vascular Cardiac
Chronic PH
Pulmonary hypertension associated with
lung disease or hypoxemia
Pulmonary arterial hypertension
Pulmonary hypertension secondary to
chronic vascular obstruction
Pulmonary hypertension secondary to
left heart dysfunction
Perioperative
factors acutely
increasing PVR
CPB-related myocardial or
pulmonary injury
Mechanical ventilation
- Alveoli overdistention
- Respiratory acid-base disturbances
Mechanical obstruction
- Thromboembolus
- Air, fat, or tumor emboli
Acute vasoconstriction
- Hypoxemia
- Hypercapnia
- Acidosis
- Pain
- Hypothermia
Myocardial dysfunction
- RV myocardial infarct
- Anesthesia-related decrease in
myocardial contractility
Fluid overload
- Left heart dysfunction
- Tricuspid regurgitation
- Pulmonary valve regurgitation
Perioperative
factors increasing
risk of RV
dysfunction
Changes in intrathoracic pressure
limiting coronary blood flow
Systemic hypotension
- Anesthesia
- Sepsis
Hypovolemia
- Acute blood loss
- Fluid depletion
- Fluid shifts
Reduced coronary perfusion
- Inadequate preload
- LV dysfunction
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IV Prostacyclin management &
changeout
•DEDICATED long-term single lumen tunneled catheter
(Hickman)
• Initially must be primed with medication
•Catheter length, pump infusion rate, half-life of
medication all factor in
• Pharm D’s, ICU nursing, MD’s responsible for this
•NEVER flush the line, NEVER stop the infusion
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IV Prostacyclin management &
changeout
• Catheter removal or in case of catheter malfunction
• Alternative IV access must be obtained first
• Ensures continuous prostacyclin delivery, avoids acute rebound PH
due to short half-life of med
• Central venous access (including PICC lines) preferred over PIV’s
• If multiple lumens, DEDICATE and LABEL lumen through
which prostacyclin is being infused
• NEVER flush the dedicated prostacyclin lumen
• Bolus of these potent, quick acting medications can have
lethal effects
• New catheter must be primed as above
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Contact Information
Clay Shamblin
864-546-8024
Antine Stenbit
864-884-8119
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Thank you